US3328626A - Rotary anodes of x-ray tubes - Google Patents

Rotary anodes of x-ray tubes Download PDF

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Publication number
US3328626A
US3328626A US392234A US39223464A US3328626A US 3328626 A US3328626 A US 3328626A US 392234 A US392234 A US 392234A US 39223464 A US39223464 A US 39223464A US 3328626 A US3328626 A US 3328626A
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United States
Prior art keywords
tungsten
anode
electron beam
molybdenum
core
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US392234A
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English (en)
Inventor
Natter Bernhard
Sedlatschek Karl
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Schwarzkopf Technologies Corp
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Schwarzkopf Technologies Corp
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Publication date
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
    • H01J35/108—Substrates for and bonding of emissive target, e.g. composite structures
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K4/00—Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/08—Targets (anodes) and X-ray converters
    • H01J2235/083—Bonding or fixing with the support or substrate
    • H01J2235/084—Target-substrate interlayers or structures, e.g. to control or prevent diffusion or improve adhesion

Definitions

  • Rotary anodes of X-ray tubes have an anode core formed principally of,a molybdenum-tungsten alloy and an adhering target layer formed principally of tungsten.
  • the molybdenum-tungsten alloy of the anode core consists principally of molybdenum alloyed with 2 to 10% of tungsten and it may contain up to 50% tungsten, all proportions given by weight.
  • the moly-bdenum-tungsten alloy of lthe anode core may also contain alloy additions of rhenium, niobium and osmium, with rhenium up to 30% by weight, being primarily suitable for such anode core.
  • This invention relates to X-ray tubes operating with rotary anodes such as described in U.S. Patent 3,136,907 and more particularly to the rotary anodes of such tubes.
  • Tungsten has proved very eicient as a material for X-ray anodes owing to its high melting point and high atomic number.
  • tungsten in order to reduce the requirement of tungsten in X-ray an-odes to a minimum and to facilitate its shaping it has been previously proposed to make the core of the rotary anodes of molybdenum land to provide the molybdenum core with a layer of tungsten in the area the electrons impinge on the anode.
  • Such anodes also have a lower weight 4than those made of solid tungsten.
  • the core of the anode consists mainly of molybdenum alloyed primarily with tungsten, as well as Itantalum, niobium, rhenium and osmium.
  • An addition of as little as 0.5% tungsten results in an increase in hot strength, recrystallization temperature and inhibition of grain growth of the anode.
  • a further object of the invention also includes embodiments in which the molybdenum-tungsten alloy of the anode core is alloyed with other refractory metals. Rhenium in quantities of up to 30% is primarily suitable for this purpose. (In the specification and claims all percent proportions are given by Weight.)
  • FIG. 1 is a diagrammatic view of one example of an X-ray tube operating with a rotary anode of the invention.
  • FIG. 2 is an enlarged elevational view, partially in cross-section of the anode of FIG. 1.
  • FIGS. 1 and 2 show an example of [an X-ray Itube operating with a rotary anode of the invention.
  • the glass envelope contains, in a very high vacuum, the cathode system 2 with the filament or filaments 3 ⁇ in the concentrating member located opposite to the conical portion of anode disc 7 which is connected to and rotated by a rod 6 of the motor rotor 5.
  • a high tension voltage so that the cathode is negative andthe anode is positive
  • a beam of electrons emitted from the incandescent filament 3 bombard the focal target seat 10 of the anode 7 and produce X-radiation at this point.
  • the electron beam energy is transformed almost entirely into heat which, rapidly heats the focal seat of target 10 and the whole mass of the anode 7.
  • the tube structure above described is of a known type and the rate at which successive exposures may be made, or at which exposures may be made following a viewing, depends upon the thermal capacity of, and the speed of cooling from the anode disc 7.
  • the core of the anode 7 consists mainly of molybdenum alloyed with another refractory metal. Suitable alloying additions are primarily tungsten, as well as tantalum, niobium, rhenium and osmium. An addition of as little as 0.5% tungsten results in an increase in hot strength, recrystallizationtemperature and an inhibition in grain growth of the anode core 7.
  • the molybdenum-tungsten part and the tungsten part can be made separately by powder-metallurgical methods and the two parts can then be joined and given their final shape by precision forging.
  • the entire anode with its target can be pressed from powder of the corresponding compositions then sintered and the iinal shape imparted by suitable methods such as rolling, stamping, forging or other suitable operations.
  • An X-ray tube having a rotary metallic anode body with an exposed target area and electron beam means for producing an electron beam impinging on said target area and causing emission of X-rays therefrom,
  • said anode body having an anode core consisting principally of a molybdenum alloy containing 2 to 10% 3 4- by weight of tungsten material and an adhering target References Cited layer exposed to said electron beam consisting prin- UNITED STATES PATENTS CiPaHY 0f tungsten 1,153,290 9/1915 Coolidge 313-330 2.
  • An X-ray tube as clarrned in claim 1, 5 2,125,896 3/1938 Driggs et aL 3,13 330 said anode core consisting essentially Of molybdenum 2,863,083 12/ 1958 Schram 313-330 alloy with 4 to 10% by weight of tungsten. 3,136,907 6/ 1964 Kieffer et al. 313-330 3.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Solid Thermionic Cathode (AREA)
  • Laminated Bodies (AREA)
US392234A 1963-09-02 1964-08-26 Rotary anodes of x-ray tubes Expired - Lifetime US3328626A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT703863A AT248555B (de) 1963-09-02 1963-09-02 Drehanode für Röntgenröhren

Publications (1)

Publication Number Publication Date
US3328626A true US3328626A (en) 1967-06-27

Family

ID=3592159

Family Applications (1)

Application Number Title Priority Date Filing Date
US392234A Expired - Lifetime US3328626A (en) 1963-09-02 1964-08-26 Rotary anodes of x-ray tubes

Country Status (7)

Country Link
US (1) US3328626A (fr)
AT (1) AT248555B (fr)
BE (1) BE652186A (fr)
CH (1) CH440466A (fr)
DE (1) DE1233499B (fr)
GB (1) GB1010882A (fr)
NL (2) NL6409522A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397338A (en) * 1964-02-26 1968-08-13 Siemens Ag Rotary anode plate for X-ray tubes
US3579022A (en) * 1967-08-28 1971-05-18 Schwarzkopf Dev Co Rotary anode for x-ray tube
US3610984A (en) * 1967-12-28 1971-10-05 Tokyo Shibaura Electric Co Rotating-anode x-ray tube with multiple focal areas
US3778654A (en) * 1972-11-02 1973-12-11 Gen Electric Molybdenum alloy target for mammographic usage in x-ray tubes
FR2350685A1 (fr) * 1976-05-03 1977-12-02 Gen Electric Anode perfectionnee pour tube a rayons x et son procede de fabrication
FR2433829A1 (fr) * 1978-07-24 1980-03-14 Gen Electric Anode tournante pour tube a rayons x
US4780902A (en) * 1985-07-11 1988-10-25 Schwarzkopf Development Corporation Rotary anode for X-ray tubes
US5372661A (en) * 1992-02-14 1994-12-13 E. I. Du Pont De Nemours And Company Alloys of molybdenum, rhenium and tungsten
DE19536917A1 (de) * 1995-10-04 1997-04-10 Geesthacht Gkss Forschung Röntgenstrahlungsquelle
US11043352B1 (en) 2019-12-20 2021-06-22 Varex Imaging Corporation Aligned grain structure targets, systems, and methods of forming

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT257751B (de) * 1965-10-11 1967-10-25 Plansee Metallwerk Drehanode für Röntgenröhren
GB2275054A (en) * 1993-02-10 1994-08-17 Rank Brimar Ltd Tungsten articles and method for making them

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1153290A (en) * 1915-04-10 1915-09-14 Gen Electric X-ray target.
US2125896A (en) * 1934-07-10 1938-08-09 Westinghouse Electric & Mfg Co Article of manufacture and method of producing the same
US2863083A (en) * 1956-03-30 1958-12-02 Radiologie Cie Gle X-ray genenrator tubes
US3136907A (en) * 1961-01-05 1964-06-09 Plansee Metallwerk Anticathodes for X-ray tubes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT163155B (de) * 1942-11-25 1949-05-25 Philips Nv Scheibenförmige Anode für Röntgenröhren
AT185901B (de) * 1951-11-21 1956-06-25 Philips Nv Verfahren zur Herstellung einer Anode für Röntgenröhren.
NL230714A (fr) * 1958-08-21
NL122291C (fr) * 1959-10-12
NL276309A (fr) * 1961-03-30

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1153290A (en) * 1915-04-10 1915-09-14 Gen Electric X-ray target.
US2125896A (en) * 1934-07-10 1938-08-09 Westinghouse Electric & Mfg Co Article of manufacture and method of producing the same
US2863083A (en) * 1956-03-30 1958-12-02 Radiologie Cie Gle X-ray genenrator tubes
US3136907A (en) * 1961-01-05 1964-06-09 Plansee Metallwerk Anticathodes for X-ray tubes

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397338A (en) * 1964-02-26 1968-08-13 Siemens Ag Rotary anode plate for X-ray tubes
US3579022A (en) * 1967-08-28 1971-05-18 Schwarzkopf Dev Co Rotary anode for x-ray tube
US3610984A (en) * 1967-12-28 1971-10-05 Tokyo Shibaura Electric Co Rotating-anode x-ray tube with multiple focal areas
US3778654A (en) * 1972-11-02 1973-12-11 Gen Electric Molybdenum alloy target for mammographic usage in x-ray tubes
FR2350685A1 (fr) * 1976-05-03 1977-12-02 Gen Electric Anode perfectionnee pour tube a rayons x et son procede de fabrication
FR2433829A1 (fr) * 1978-07-24 1980-03-14 Gen Electric Anode tournante pour tube a rayons x
US4780902A (en) * 1985-07-11 1988-10-25 Schwarzkopf Development Corporation Rotary anode for X-ray tubes
US5372661A (en) * 1992-02-14 1994-12-13 E. I. Du Pont De Nemours And Company Alloys of molybdenum, rhenium and tungsten
DE19536917A1 (de) * 1995-10-04 1997-04-10 Geesthacht Gkss Forschung Röntgenstrahlungsquelle
DE19536917C2 (de) * 1995-10-04 1999-07-22 Geesthacht Gkss Forschung Röntgenstrahlungsquelle
US11043352B1 (en) 2019-12-20 2021-06-22 Varex Imaging Corporation Aligned grain structure targets, systems, and methods of forming

Also Published As

Publication number Publication date
BE652186A (fr) 1965-02-24
AT248555B (de) 1966-08-10
NL6409522A (fr) 1965-03-03
NL136230C (fr)
CH440466A (de) 1967-07-31
GB1010882A (en) 1965-11-24
DE1233499B (de) 1967-02-02

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